Tuesday, April 5, 2011

Two COOL Brown Dwarf Discovered;are there more?

Brown Dwarfs, in theory, have been around awhile, but the first to be discovered came in 1995. Brown Dwarfs, is a fourth, remnant of a dead star after White Dwarfs, Neutron Stars, and Black Holes. A Brown Dwarf , is a star with low mass 0.08 Solar Mass (0.08 Msun); too low to ignite hydrogen fusion. Thus a Brown Dwarf never fires-up. Brown Dwarfs may end up in one of two new proposed stellar classification of stars termed "L" and "Y" after the present system of O,A,B,G,K & M (Hottest to Coolest). Our Sun is a G star. The L class would possess clouds of minerals and iron, while Y class would have clouds of water ice. The only heat generated is by gravity and pressure. Discovered Brown Dwarfs have a Black-Body radiation (Thermal Energy) range of 3800 degree Kelvin(3526.9 degrees Celsius) to 2700 degree Kelvin (2426.9 degree Celsius). Recently two new Brown Dwarfs have been discovered with temperatures of 370 and 300 degree Kelvin(96.9 degrees Celsius and 26.9 degrees Celsius respectively). These Brown Dwarfs are super cool compared to other discoveries. The significance here is that the planet Jupiter, which also contains hydrogen and helium and is low is relative low mass, radiates thermal energy at 150 degree Kelvin (-123.2 degrees Celsius). It has been theorized that Jupiter may have been the "other" star in our Solar System, that didn't ignite. Jupiter's mass is 0.001 Solar Mass. Further more, Earth average temperature is 288.2 degrees Kelvin (15 degrees Celsius or 59 degrees Fahrenheit for us non-metric humans.) Earth's most abundant element is hydrogen. Could we be a brown dwarf? Well, Earth's mass is 0.000003 solar mass. Which makes hydrogen fusion rather low in probability. We do have minerals and iron, but mostly in the body of the planet, not clouds. We do, however, have clouds of water ice. Are we a Class Y Brown Dwarf?? The division between a star and a planet may be becoming blurred. With search for Dark Matter and now more Brown Dwarfs being discovered, who knows, we may have been a potential star. We do know that we are the "star" of the planets; we have life.

1 comment:

  1. https://www.youtube.com/watch?v=tGES3MnMhfQ

    "We may have been a potential star."

    I ran with that statement to its conclusions starting on September 3rd, 2011. It continues to be one hell of a ride. Turns out the galaxy is much more grand than what professional astronomers can imagine. Be careful not to let your education get in the way of your learning.

    -Jeffrey Wolynski